Tumbling-mill structure



H. W. TITGEN TUMBLING MILL STRUCTURE June 17, 1930.

2 Sheets-Sheet l Filed Sept. 22, 1

June 17, 1930. H. w. TITGEN TUMBLING MILL STRUCTURE Filed Sept. 22, 1926 2 Sheets-Sheet Patented June 17, 1930 nnirsn s'rarss PATENT orries fiABRY wpTlTGEN, GLENSIDEfPENNSYLVANIA T UMBLING-MILL STRUCTURE I Application filedjSeptember 22, 1926. Serial No. 137,053.

the entrance end of the mill, so that the same cleaning elements maybe continuously used so long as the mill is operated, 5 [Another object of my invention is to provide a. tumbling mill, wherein a feeding cone causes a movement of the articles under treatment and the cleaning means through an inlet passage of a shell into a principal 0 working chamber of the shell, the chamber being so formed that a further movement is imparted to the articles under treatment, causing the passage thereof -from the working chamber into a discharge passage of the 5 shell.

A further object of my invention is to provide a tumbling mill, wherein a preliminary separation of undesirable materials from the articles under treatment is effected 0 in the inlet passage of the shell, the structure also eiiectinga further removal'of such materials from the principal working chamber and the discharge passage leading therefrom. I 1

lVith these and other objects and applications in mind, my invention further consists in the details of construction and operation and arrangement, hereinafter described and claimed'and illustrated in the accompanying drawings, wherein p I I I Fig. 1 is a side elevational view of tumbling mill embodying my invention;

Fig. 2 is a horizontal sectional View of the structure of Fig. 1., with the hoppers for the undesirable materials removed, the sectional plane being takenon the line IIII of Fig. 1;

Fig.3 is an end elevational view of the structure of Fig. 1 looking "from the'right; and

Fig. 4: is a transverse sectional view taken on the line IVlV of Fig. 1.

Referring to the drawings, a tumbling mill 1 comprises an inner shell or drum 2 having front and rear end sections 3 and d providing inlet and 'outlet passages 5 and 6 and an intermediate section 7 defining a principal working, chamber 8. The front end section 3 has an inlet opening 9 through which the articles under treatment, say, ra-

diator castings, may be inserted and an outlet opening 11 connected to'the working,

chamber 8. Similarly, the rear end section 4 is provided with aninlet opening 12 for the castings passing from the working chamber 8 and a" discharge opening 13 for the cleaned castings. I

In my co-pending application, Serial No. 90,577, filed Feb. 25, 1926, the sections .3, 4 and 7, together define a single cone. For some classes of work, such construction was found undesirable inasmuch as the feeding action was too rapid. Frequently, it would be necessary to pass the castings through the conical shell a number of times in order to obtain the desired cleaning action.

As a result of considerable experimental development, I have found that such undesirable results may be obviated by a construction'as shown in Fig. 1 wherein the front and rear sections 3 and't are of substantially cylindrical form and the inter mediate section 7 is of enlarged cross-sectional area. The force necessary to cause the automatic feeding of the castings and cleaning means, say, jacks, from the working chamber 8 through the discharge passage 6 is established by a front conical portion 14 of the intermediate section 7. The

portion 142 extends from the outlet opening 11 of the front section 3 rearwardly to a cylindrical portion 15, The extent of the feeding action by the conical portion 14: may be controlled by an oppositely tapered portion 16 which extends forwardly from the inlet opening 12 of the rear end section. 4 to the cylindrical portion 15. It will be noted that the angle of the tapered portion 16 is less than that of the portion 14, otherwise the castings and jacks would not leave the cleaning chamber 8.. The angular relation of these tapered portions is dependent upon the class of work under treatment.

\Vhere it is desirable to vary the force imparted to the castings in the working chamber 8 after the construction of the drum 2, a conical shell 17 may be removably positioned in said working chamber with a smaller opening 18 thereof contiguous with the outlet opening 11 of the front end sec-, tion 3 and with a larger opening 19 direct-V sage'12, a feeding cone 21 may be removably inserted, shown in Fig. 2 wherein a smaller opening 22 thereof is substantially contiguous with the inlet opening 9 and a larger outlet opening 23 is substantially continuous with the passage 5. The cone 21 preferably extends to a rear portion 24 of the front section 3. The portion 24 has at least three openings 25 through which the jacks may be inserted into the inlet passage 5, all as will appear hereinafter in greater detail.

The castings inserted in the drum 2 through the inlet openings 9 or 22 generally having adhering thereto loose undesirable materials which should beseparated therefrom before the castings pass into the prin cipal working chamber 8. To this end, a portion 26 of the front end section 3 inter mediate the apertured portion 24- and a front end portion 27 isprovided with a plurality of openings through which said undesirable materials may pass. In the event that the feeding cone 21 is employed, a similar perforated portion 28 is provided therein which is positioned in alignment with the perforated portion 26.

The scale and other materials removed from the castings in the chamber 8 should be discharged at this point, otherwise said undesirable materialsmay be ground into the castings or the latter scratched thereby. Accordingly, the cylindrical portion 15 intermediate the oppositely tapered propelling and retarding portions 14 and 16 is provided with a plurality of discharge openings. Should the cone 17 be employed, this also is apertured.

The rear end section 4 comprises contiguous perforated portions 29, 31 and 32. The perforations of the portion 29 are relatively fine, so that only the smallest of the jacks as well as the undesirable materials carried by the castings from the working chamber 8 may be discharged from the passage 6. The perforations of the portion 31 are of increased size, so that the jacks of average size may readily pass therethrough, while the perforations of the portion 32 are still larger, being shown in the form of slots,.so that the jacks may readily pass therethrough rather than through the outlet opening 13 of the passage 6. The cleaning elements are thus gradually removed from therear end section 4 as they approach the discharge outlet 13 thereof, only the larger of the cleaning elements reaching the end portion 32.

A plurality of longitudinally extending strip; 33 may be mounted onthe inner side of the drum 2, so that the castings as well as the jacks may be lifted upon a movement of said drum. The removal of undesirable materials, such, for example, as sand is thus further assured. V

In order that the inlet passage 5 may be continuouslysupplied with jacks so long as the tumbling mill is in operation, I provide an outer conveyor shell or drum 34, the respective ends 35 and 36 of which surround the perforated portions 29, 31 and 32 of the rear end section 4 through which the jacks pass from the drum. 2 and the apertured portion 24 throughwhich the acks enter the front end section 3 of the drum 2. The ends 7 35 and 36 of the conveyor shell34 may be rigidly secured to the adjacent portions of the inner shell. 2 by means of annular plates 37 and 38. These plates also serve toclose the ends of an annular chamber 39 formed between tie inner and outer shells 2 and 34.

The movement of the jacks immediately on entering the conveyor shell may be facilitated by tapering a rear section 41 thereof oppositely to the tapered propelling portion 14 of the inner shell 2. The further movement of the acks to the inlet openings 25 of the inner shell 2 may be effected by mounted on the inner walls of the outer cone veyor shell 34. The portions of the flails 42 adjacent to the apertured portion 24 are provided with enlarged sections 43, whereby the aclrs may be lifted as the conveyor shell 34 rotates and permitted to fall under the action of gravity through the openings 25.

In order to prevent the jacks entering the passage 5 through an upper opening from escaping directly through a lower, opening, shields 44 are provided. As shown in Figs.

' 2 and 4, these shields comprise an upwardly angled portion spaced from the opening 25 and an end portion 46 which serves to prevent the castings from catching under the raised portion 45 during the movement toward the working chamber 8. The lifting of the jacks may be further facilitated by means of a plurality of lifting flights 47, of which three are shown in Fig. 4.

of spiral flails 42 which may be The materials removed from the castings in the principal working chamber 8 aswell as in the discharge passage 6 passes into the the perforated portion ofthe working chamber 8. In order that'suchinaterials may be separated fromthejac {5 while the-whole isinia relatively loosecondition, itwill be noted that the flights 42ers extended over a part only of the perforated portion 48; The perforated portion 48 of the outer conveyor shell 84 may be enclosed by. a housing 51, as shown in Fig. 1,'an upper portion 52 of which is provided with an outlet 53 leading to a suction fan (not shown), whereby the dust incident to the abrasive or cleaning, operation may be removed. The heavier portions of the materials removed fromthe castings pass to hopper portions 54 of the housing 51.,

. The outer conveyor shell 34; is provided with an; extension 55 having. anapertured portion 56 positioned in alignment with the apertured' portions 26 and, 5280f the front end section 3 and the feeding cone 21, respectively. These apertured portions are enclosedby .ahousing 57 adaptedto perform the same functions asrthe. housing 51 for the perforated secti0n-t8. .The open end of the extension 55 may be closed by an annular plate 58 which is sopositioned on the front end section'3 of the inner shell 2 that the front end portion 27 extends outwardly beyond said plate 58. I

The outer conveyor shell 3t'fis provided with a pair of spaced tires 59 and 61 which are respectively mounted on pairs of antifriction supporting structures 62 and 63. Each of the structures 62, 63 comprises a pair of anti-friction rollers 64 and'65 which are mounted on asaddle66 supported by a pivot pin 67 and a base structure- 68. The

weight carried by the rollers 64 and may be adjusted by means of a screw member 69 which abuts against a shoulder 71 formed on the saddle 66. The rotation of the tum bling mil-l lrmay beeffected'by means of a driving motor 72 connected by gearing 73 to a pinionZtineshingwith. a gear-wheel 75 rigidly secured to the outer, conveyor shell 34. 1 .7

Assuming the 'tumbl'inginilll in opera.

tion anda constant supply of jacks to the inlet, passage, 5, when the castings or other:

articles to be, treatedare inserted in the inlet passage 5 through the inlet opening 22 of the. feeding cone 21, agforce: is imparted to said articlestending to feed .the same in the direction ofthe principal working chamber 8;, As the articles'pass the. perforated-portions 26 and :28,.a preliminary manded by the prior art."-

removal .of undesirable materials from the articles Occurs; As the articles and the 121.0118 or other cleaning elements enter the working rchamberS, an additional force is imparted to the same by the tapered portion 14,"or by the cone 17 should this be employed instead." The movement of thearticles and the cleaning elements out of the chamber 8, however, is retarded by the oppositely tapered portion 16 with the 'resuit that, said articles are retained in the working chamber 8- a .sutficient period to insure a thorough cleaning of the same; The undesirable materials formed as a re sult oftheabrasive action in the chamber 8 are discharged through the perforated portion 15 thereof into theconveyor shell 34; and then through the apertures 49 *in' the outer'shell portion48 into the housing 51-. i

During the movement of the articles and the: cleaningelements in the outlet passage 6, 'the removal of theundesirable materials from the articles is completed. The cleaning elements are alsodischarged through the'apertured portions 29 31and32, and

the finished articles finally passed through the outlet opening 13. The cleaning elements discharged from the passage 6 are conveyed by the tapered portion 41 of the conveyor shell 34 to the fiails 42. The latter in combination with the flights 47 then cause 'a'further movement of the cleaning elements through the inlet openings '25.

Theshell3i thus provides a return path for tea I dicated in theappendedclaimsor as are-de- Iclaimz v I 1. A tumbling barrel shell provided with a principal working chamberand inlet and outlet passages forsaid chamber, sa1d1nlet passage having Qaeningsthrough which undesirable materials may be removed, :and

cleaning elements inserted,respectively, said outlet. passage ihaving. openings through which the cleaningelements may be dis j charged and means for receiving the-clean ing'elements at an-outletpassage and for returning them to said'openings- 1n the 1n-i let passage I r 2; A tumbling barrel drum i one section. formed to constitute principal working chamber and connected sections defining inlet and outlet. passagespsaid lnlet assa 'e havin one set' of enin s ermitp D b O and another set of openings through which cleaning elements may enter, said outlet passage having openings through which said cleaning elements may be discharged, said working chamber also having openings permitting the removal of undesirable materials.

'3. Atumbling' barrel shell having a principal working chamber andinletand outlet passages therefor, said chamber being so formed that the articles under treatment will be fed through said shell in a substantially continuous stream, but. so that they may be retained therein a desired interval, said inlet passage having one set of openings permitting a preliminary removal of undesirable materials and a second set of openings through which the cleaning elements may be passed, said principal working chamber having openings through which undesirable materials may be discharged, and said outlet passage having openings permitting the discharge of said cleaning means as well as undesirablematerials and means for returning said cleaning means from said outlet passage to the sec ond set of openings in said inlet passage.

4. A tumbling mill comprising a drum having inlet and discharge openings for the articles to be treated and the cleaning elements, at least one portion of said drum being formed to impart a movement to said cleaning elements axially of said drum, means whereby said movement may be re tarded to a desired extent, and a second drum interconnecting certain of said openings so as to provide a return path for the cleaning elements.

.5. A tumbling .mill comprising a drum having entrance and discharge openings for the articles under treatment, means adjacent to said entrance opening for guiding said articles into said drum and for causing a preliminary separation of the undesirable materials from said articles, means adjacent said discharge opening for guiding said articles from said drum and for discharging thevcleaning means therefrom, one section ofs'aid drum defining a working chamber formed to cause a movement of sald artlcles V a working chamber and inlet and outlet passages, said inlet passage being formed to cause feeding of the articles under treatment and the cleaning means to said chamreturning to said inlet passage the cleaning means discharged from said drum, and means whereby undesirable materials may be removed from said inlet passage.

7; A tumbling barrel drum provided with a principal working chamber and inlet and outlet passages, said inlet passage being formed to cause feeding of the articles under treatment and the cleaning means to said chamber, the latter having oppositely-tapered portions adapted to causefeeding of said articles and cleaning means from said chamber, means arranged substantially concentrically with said drum for returning to said inlet passage the cleaning means discharged from said drum, so that the same cleaning means may be continuously used, and means whereby undesirable materials may be removed from said inlet passage.

8. A tumbling mill comprising adrum having entrance and discharge openings, said drum being provided with openings adjacent to said entrance opening through which cleaning means may' be inserted and undesirable materials may be discharged, said shell also having discharge openings for said cleaning means adjacent. to said drum discharge opening, and a conveyor drum interconnecting the discharge and inlet openings for said cleaning means. I

9. A tumbling mill comprising a drum having inlet and outlet ends, said drum hav ing openings adjacent to said inlet end through which the cleaning means may be inserted and undesirable materials discharged, said drum having discharge openings for the cleaning means adjacent to said outlet end, a conveyor shell for interconnecting the discharge'and inlet openings for said cleaning means, and means whereby undesirable material passing into said conveyor drum may be removed.

10. A tumbling mill'comprising an inner shell provided with openings adjacent to one mentto beretained'therein a desired time interval, and an outer conveyor shell having a tapered portion adapted to receive the cleaning means passingthrough said lastmentioned' opening, another portion being in operative relation to the inlet opening for thecleaning means. 1 V

11 A tumbling barrel comprising a drum having inlet and outlet ends, an intermediate section of said drum having spaced oppositely tapered portions defining a Working chamber, said drum having inlet-and outlet openings for the cleaning means adjacent to said ends, and a conveyor shell for interconnecting said openings, so that the same cleaning means may be continuously used.

12. A tumbling mill comprising a shell having cylindrical end sections and an enlarged intermediate section defining avvorking chamber, one section having openings through which the cleaning means may be inserted and undesirable materials removed, the other end section having discharge openings for the cleaning means, and a conveyor shell connecting the inlet and discharge openings for the cleaning means, so that a continuous supply of cleaning means may be assured for said Working chamber.

13. A tumbling mill comprising a shell having cylindrical end sections and an enlarged intermediate section, one end section having inlet and discharge openings for the cleaning means and the undesirable materials, the other end section having discharge 1 openings for the cleaning means, a conveyor shell interconnecting said inlet and discharge opemngs for the cleamng means and also adapted to receive the undesirable materlals discharged from said intermediate section, sald conveyor shell having openings through Which said last-mentioned materials may be discharged and also provided With an extension adapted to receive the undesirable material from said first-mentioned discharge openings, said extension also having discharge openings.

14:. A tumbling barrel shell having cylindrical end sections and an intermediate sec-' tion of enlarged diameter formed tocause an automatic feeding therethrough of the articles under treatment, one end section having openings for the insertion of the cleaning means and the discharge of undesirable materials and also provided With a feeding cone, the other end section having discharge openings for the cleaning means, a conveyor shell interconnecting the inlet and discharge openings for said cleaning means, said conveyor shell being provided with an extension adapted to receive said first-mentioned undesirable material;

HARRY W. TITGEN. 

